储能科学与技术 ›› 2020, Vol. 9 ›› Issue (1): 266-270.doi: 10.19799/j.cnki.2095-4239.2019.0214

• 储能测试与评价 • 上一篇    下一篇

锂离子电池组结构热仿真

田刚领1(), 刘皓2, 杨凯2(), 张慧卿3, 罗军1   

  1. 1. 河南平高电气股份有限公司,河南 平顶山 467001
    2. 中国电力科学研究院有限公司,北京 100192
    3. 北京化工大学,北京 100029
  • 收稿日期:2019-09-24 修回日期:2019-10-30 出版日期:2020-01-05 发布日期:2019-10-24
  • 通讯作者: 杨凯 E-mail:tiangangling@pinggao.sgcc.com.cn;yangkai@epri.sgcc.com.cn
  • 作者简介:田刚领(1977—),男,硕士研究生,研究方向为储能技术,E-mail:tiangangling@pinggao.sgcc.com.cn;
  • 基金资助:
    河南省重大科技专项(171100210200)

Thermal simulation analysis of a lithium-ion battery group

Gangling TIAN1(), Hao LIU2, Kai YANG2(), Huiqing ZHANG3, Jun LUO1   

  1. 1. Henan Pinggaoelectic Co. , Ltd. Pingdingshan 467001, Henan, China
    2. China Electric Power Research Institute, Beijing 100192, China
    3. Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2019-09-24 Revised:2019-10-30 Online:2020-01-05 Published:2019-10-24
  • Contact: Kai YANG E-mail:tiangangling@pinggao.sgcc.com.cn;yangkai@epri.sgcc.com.cn

摘要:

锂离子电池组的热特性对于电池组的运行维护具有重要影响。将单体电池热模型简化为均匀发热体,减少仿真流程中的计算量,针对锂离子电池组进行热仿真分析,分析其结构的合理性,并通过实验验证其准确性。利用绝热加速量热仪(accelerating rate calorimeter,ARC)采集锂离子电池的热特性参数,利用简化的电池单体热模型,选择风冷作为冷却方式,通过CFD(computational fluid dynamics)以及CAD(computer aided design)软件建立锂离子电池组的热模型并进行求解,分析电池组内部流场分布、电池组运行时的温度数据,最后通过样机实验测试验证仿真结果的准确性。该电池组在0.5 C恒流充放电条件下,电池模拟温度与实验测试温度变化趋势一致,电池组模拟最高温度与实验测试温度误差0.9 ℃,电池模拟温差与实验测试温差误差0.2 ℃。

关键词: CFD仿真, 锂离子电池组, 流场, 温度场

Abstract:

The thermal characteristics of the lithium-ion battery packs are of considerable significance for their operation and maintenance. In this study, a cell thermal model is simplified into a uniform heating unit to simplify the computation during the simulation process. The novel model structure is validated through thermal simulation using a lithium-ion battery pack, and its accuracy can be experimentally verified. Further, the thermal characteristic parameters of the lithium-ion cells are acquired via an accelerating rate calorimeter. Subsequently, a lithium-ion battery pack thermal model is constructed and solved using computational fluid dynamics and computer-aided design programs based on the simplified cell thermal model and considering an air cooling scenario. The internal flow field distribution and in-service temperature data of the battery pack are analyzed. Finally, the accuracy of the simulation result is verified through a prototype experiment. When charged and discharged at a constant current of 0.5C, the simulated temperature of this battery pack exhibits the same variation profile as that exhibited by the experimental measurement with an error of 0.9 °C being observed with respect to the maximum temperature and 0.2 °C being observed with respect to the temperature difference in case of the simulation and experimental results.

Key words: CFD simulation, Li-ion battery group, flow field, temperature field

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